About the Authors

Yukihide Maeda

maedayj@yahoo.co.jp

Affiliation Department of Otolaryngology – Head and Neck Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmacy, Okayama, Japan

Kunihiro Fukushima

Affiliation Department of Otolaryngology – Head and Neck Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmacy, Okayama, Japan

Ryotaro Omichi

Affiliation Department of Otolaryngology – Head and Neck Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmacy, Okayama, Japan

Shin Kariya

Affiliation Department of Otolaryngology – Head and Neck Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmacy, Okayama, Japan

Kazunori Nishizaki

Affiliation Department of Otolaryngology – Head and Neck Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmacy, Okayama, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: YM KF KN. Performed the experiments: YM RO. Analyzed the data: YM KF. Contributed reagents/materials/analysis tools: YM SK. Wrote the paper: YM KF KN.